Summary For auditory integration (AI) therapy, the largest body of literature relates to its use in autism. Several systematic reviews of AI therapy in the treatment of autism found limited evidence to support its use. No comparative studies were identified that evaluated the use of AI therapy for other conditions.
The actual cost to install a gas fireplace may vary depending on your location, the product selected, complexity of the installation process, additional accessories purchased, and other options. 1  Top vented gas fireplace inserts cost $750 to $3,000, and installation adds another $500 to $1,000. Top vented gas fireplace inserts cost $750 to $3,000, and installation adds another $500 to $1,000. 2  Direct-vent gas fireplaces cost $1,000 to $3,500, plus $500 to $1,000 for installation.
Installation for a natural gas fireplace can cost anywhere from $300 to $1,200 depending on the availability of natural gas and electricity in the location where you want the fireplace, as well as a number of other factors.ood burning fireplaces tend to be less expensive than natural gas or propane on the low end, but much more expensive on the high end. Most masonry fireplaces cost $5,000 or more due to the labor required to install each individual brick or stone within your home.